Word: diets
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Dates: during 2000-2009
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...feeding steers grain and supplements can create safety issues--for cattle and humans. Biologically, cattle are ruminants, exquisitely evolved to graze grass, and researchers have found that a grain diet raises the acidity in steers' guts. This breeds an acid-resistant form of E. coli that can spread from feces-contaminated carcasses to meat. Although USDA inspections are supposed to detect E. coli, the system is not perfect. In 1993, 600 people in Seattle got sick and three children died after eating E. coli-- tainted hamburger. Since then, outbreaks have triggered more recalls and led to a federal recommendation that...
...many accounts, the grain diet contributes to one more public-health problem. Overuse of antibiotics has caused more and more bacteria to become resistant to treatment, a factor in the deaths of more than 60,000 Americans each year. An estimated 70% of the nation's antibiotics are fed to livestock and poultry to prevent illnesses and promote growth. Some 300 organizations, including the American Medical Association, have called for an end to nontherapeutic use of antibiotics in animal feed. The NCBA counters that antibiotics are judiciously applied. But the line between necessary treatment and routine use is blurred...
...also unclear whether switching to artificial sweeteners helps you lose weight, though a glance at our collective potbelly suggests that it doesn't. Some researchers think artificial sweeteners may actually interfere with our efforts to diet. A 2004 study by psychologists at Purdue University found that when rats were fed artificially sweetened liquids for 10 days, they lost their innate ability to gauge the calorie content of foods containing real sugar...
Other experts speculate that the whole American diet may be calibrated to an artificially high level of sweetness, and that we may be in danger of generalizing our propensity for sweets--artificial or otherwise--to everything we eat. "Why do we have so much sugar in things like peanut butter?" Brownell asks. "Why do they put sugar in soups...
...molecular biologists is starting to give that old adage a decidedly high-tech twist. By combining the latest discoveries in human genetics with a deeper understanding of the hundreds of compounds found in food, investigators have begun to tease apart some of the more complex interactions between your diet and your DNA. In the process, they hope eventually to give consumers more personalized advice about what to eat and drink to stave off heart disease, cancer and other chronic conditions of aging. "We are trying to put more science behind the nutrition," says Jose Ordovas, a geneticist at the Friedman...